Electric cooker



FIG. 1 is a perspective view of an electric cooker showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings depict portions of the electric cooker that form no part of the claimed design. 

CLAIM The ornamental design for an electric cooker, as shown and described. 